摘要
采用化学法、生物法以及生物化学法纯化马铃薯渣中的纤维素,并用H2O2对薯渣纤维素进行漂白,得到纯化的马铃薯渣纤维素;采用高压均质机对薯渣纤维素进行纳纤化处理.利用光学显微镜、扫描电子显微镜(SEM)和激光粒度仪对薯渣纤维素进行观察和表征,采用X射线衍射仪对薯渣纤维素的结晶性质进行检测.结果表明:3种方法所得产物的得率不同,顺序为生物法>生物化学法>化学法,以化学法所得产物最为纯净;纯化后薯渣纤维素的ISO白度从22.6%提高到84.0%;高压均质处理之前呈片状结构,处理后呈现明显的微纤化,宽度达到100,nm以下;薯渣纤维素经纯化以及高压均质化后,其结晶结构均为纤维素I型,但高压均质处理对纤维素结构有一定的破坏作用,导致结晶度有所下降.
Chemical,biological and bio-chemical methods were adopted to purify the cellulose from potato residue,and then the cellulose was bleached with H2O2. At last,the purified cellulose was treated with high pressure homogenizer in order to obtain the nano-fibrillated cellulose（NFC）. The morphology of the cellulose from potato residue was characterized with optical microscopy,SEM and Laser particle size analyzer,and the crystallization properties were determined with X-ray diffraction（XRD）. The results showed that the order from high to low of the yields with different methods is as follows：biological method,bio-chemical method and chemical method. The brightness of the cellulose inceased significantly from 22.6%ISO to 84.0%ISO. All the samples before homogenization had the similar sheet structure,while it changed into mi-crofibril structure with the width less than 100,nm after homogenization. The cellulose from potato residue has the same crys-talline structure,namely Cellulose I. The homogenization with high pressure can somewhat damage the structure of the cellu-lose crystals,which leads to a decrease of the crystallinity.
出处
《天津科技大学学报》
CAS
北大核心
2015年第1期51-55,共5页
Journal of Tianjin University of Science & Technology
基金
国家级大学生创新创业训练计划项目(201310057048)
天津市科技支撑计划项目(12ZCZDGX01100)
关键词
马铃薯渣
纤维素
纯化
纳纤化
结晶性能
potato residue
cellulose
purification
nano-fibrillation
crystallization properties
